esmp3/src/controller.cpp

#include "controller.h"
#include "spi_master.h"

Controller::Controller(Player* p) {
	_player = p;
	_rfid = new MFRC522(PIN_RC522_CS, MFRC522::UNUSED_PIN);

	SPIMaster::enable(PIN_RC522_CS);
	Serial.println("Initializing MFRC522...");
	_rfid->PCD_Init();
	_rfid->PCD_DumpVersionToSerial();
	SPIMaster::disable();
}

void Controller::loop() {
	unsigned long now = millis();
	if ((_last_rfid_scan_at < now - RFID_SCAN_INTERVAL) || (now < _last_rfid_scan_at)) {
		_check_rfid();
		_last_rfid_scan_at = now;
	}
	_check_serial();
}

uint32_t Controller::_get_rfid_card_uid() {
	SPIMaster::enable(PIN_RC522_CS);
	if (!_rfid->PICC_ReadCardSerial()) {
		if (!_rfid->PICC_IsNewCardPresent()) {
			return 0;
		}
		if (!_rfid->PICC_ReadCardSerial()) {
			return 0;
		}
	}
	uint32_t uid = _rfid->uid.uidByte[0]<<24 | _rfid->uid.uidByte[1]<<16 | _rfid->uid.uidByte[2]<<8 | _rfid->uid.uidByte[3];
	SPIMaster::disable();
	return uid;
}

void Controller::_check_rfid() {
	uint32_t uid = _get_rfid_card_uid();
	//Serial.printf("Found card: %08x\n", uid);
	if (uid != _last_rfid_card_uid) {
			if (uid > 0) {
				Serial.printf("New RFID card uid: %08x\n", uid);
				// Play
				String s_uid = String(uid, HEX);
				_player->play_album(s_uid);
			} else {
				Serial.println("No more RFID card.");
				// Stop
				_player->stop();
			}
			_last_rfid_card_uid = uid;
	}
}

void Controller::_check_serial() {
	if (Serial.available() > 0) {
		char c = Serial.read();
		if (c == 'n') {
			_player->track_next();
		} else if (c=='p') {
			_player->track_prev();
		} else if (c=='s') {
			_player->stop();
		} else if (c=='+') {
			_player->vol_up();
		} else if (c=='-') {
			_player->vol_down();
		} else if (c==' ') {
			_player->play_album("12345678");
		} else if (c=='q') {
			_player->play_system_sound("12345678/Biene Maja.mp3");
		}
	}
}